Nissan can get rid of 35# with the spare tire like most other companies. Keep the wheels at 17 or 18in (no need to have mine is bigger fights). Use more carbon fiber to front hood/bumper and rear-end. Take out and smooth some of the impregnated interior in the boot. Use a lighter frame material(magnesium or titanium) Cost?
Also improve on the sound/wt of exhaust since no one like the oem and have several tunes set in factory. a few ideas.
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